What is the value of $$ {2tan53°\over cot37°} -{cot80°\over tan10°}$$ is:

There are 45 trees in a row. The lemon tree is 20^th from right end. What is the rank of lemon tree from left end?

The difference of two numbers is 20 % of the larger number. If the smaller number is 20, the larger number is:

The HCF of two numbers 12906 and 14818 is 478. Their LCM is:

Out of six consecutive natural numbers, if the sum of first three is 27, what is the sum of the other three? 

The value of $$(x^{b+c})^{b-c}. (x^{c+a})^{c-a}.(x^{a+b})^{a-b}$$ when (x≠0).

What angle is made by minute hand in 29 sec? 

The difference between the interior and exterior angles at a vertex of a regular polygon is 150°. The number of sides of the polygon is